So can I just verify, if you had a pulley set with the small one at the top and an internal diameter of the pipe at 1" all the way, you could fit it on the 5HP you have there, even if it meant making a short shim sleeve for the 22mm section? Because if you can, I have one like that here. Alternatively, you already have the two steel pulleys you need, you just have to cut them off the piece of pipe then the machine shop could easily open out the diameter of the pulley then put them on a new piece of pipe for you.
